The movement of tides away from land is called ebb tide.

Here's a breakdown:

* Tide: The regular rise and fall of the ocean's surface, caused primarily by the gravitational pull of the moon and sun.

* High Tide: When the water level is at its highest point.

* Low Tide: When the water level is at its lowest point.

* Flood Tide: The movement of water towards the shore, rising the water level towards high tide.

* Ebb Tide: The movement of water away from the shore, lowering the water level towards low tide.

So, ebb tide is the opposite of flood tide. It's the period when the water recedes and retreats from the coastline.